Re: [AMRadio] Where is QSL.net???
I've have not been able to get into QSL.NET for days now. All of a sudden tonight poof it shows up. They come and go. Patience is needed with qsl.net 73, Mark W1EOF W7CE wrote: I'm having trouble getting onto QSL.net. Is it just me or is it QSL.net? 73 from Steve White, W5SAW I can't get to it either. Must be an Internet routing issue. These problems are usually solved quickly. Clay W7CE __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Magnet Wire
Rick - I never heard anything more from you on the relay covers. I can probably get you the wire you need. I have it available from 12 - 59 AWG. Either send me a sample, or measure it with a micrometer and let me know the dia. 73, Mark W1EOF ary wrote: Rick, just send me a sample, I can measure it and you tell me how much you mite need. Gary...WZ1M - Original Message - From: Rick Brashear [EMAIL PROTECTED] To: AMRadio@mailman.qth.net Sent: Wednesday, May 16, 2007 12:46 PM Subject: [AMRadio] Magnet Wire After receiving advice from several of you I have decided to rewind the neutralizing coil on the BT-20-A. It will take a little less than 200 feet of ?? gauge enamel wire. I have to measure it to be sure, but I think it's 20 gauge. I haven't done this type of winding in many years, so can someone suggest a particular brand or type of wire or can I just assume a quality enamel coated magnet wire will be fine? Thanks, Rick/K5IZ __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Tube socket info needed
Ooops... I stand corrected. 73, Mark W1EOF Larry Szendrei wrote: Edward B Richards wrote: Hi all; Can someone tell me if a 4D32 and a 832A use the same tube socket? Yep, they do. As a matter of fact Johnson said an 829 could be subbed for the 4D32 in the Viking 1, with some rewiring of the socket. -Larry/NE1S __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] WTB: National R-175 plate choke or equiv
I think I'm all set on that one. Thanks to all on the list who responded to my call for a plate choke for my amp. 73, Mark __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] WTB: National R-175 plate choke or equiv
I need a nice plate choke for my 813x2 amp. I was going to homebrew one now I'm thinking that there will be enough variables without that. I'm going for operation on all bands 160-10. So I'd rather use a known good design plate choke like the National R-175. Anybody got one for sale or trade? 73, Mark W1EOF __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Current on 6146s
Isn't 15ma *WAY* too much grid current for a pair of 6146s? In my Viking II I used to run about 6-8 if I recall correctly. They can be easily destroyed pretty quickly by too much grid current. 73, Mark W1EOF Jim candela wrote: From John E. Coleman (ARS WA5BXO): I have found it to be very important to make measurements while in operation. Except that RF will mess up the meter readings. This is why I said to ground the grid directly and then kick the rig to XMIT and make the measurements then. Checking the plate voltage on the plate while the tube is cut off is not conclusive as there may be a high resistance between the plate point and the power supply point (all the way back in the power supply circuit) and same could be true of the screen. This would cause the plate voltage to appear normal until you draw current then it may drop real low at the plate point but still be good at the power supply. RF at the plate will cause the meter to read wrong and grounding the grid will kill the bias and RF. If the rig were operating normal then grounding the grid would cause excessive plate current so this is a good check any way. 1. While in XMIT mode, when you ground the grid, the plate current should go above 200 ma. If it does, then troubleshoot the grid circuit. 2. If it does not, then leave the ground on the grid and stay in XMIT mode. Then measure the plate and screen voltages. One of them is surely wrong. The only other possibility would be the filaments are not lit up good. Rule for the day: You can't have a 100 volt drop across a good 5ft #12 wire with out a fire. John Reply by Jim, WD5JKJO: John, all good points for sure. I take a different approach that seems to work here. I have two HV probes, a 40KV probe at 1000X, and a 6 KV probe at 1000X . The resistors in these probes combined with the coax cable capacitance make a very effective low pass filter. This filters out the RF leaving just the DC. I touch the probe directly to the RF hot plate of a tube to read the plate voltage with my trusty DVM. I recently tried this on my 8877 amplifier, and it worked well even though the amplifier was running full boar into a dummy load (900w carrier or 2100w PEP SSB). These probes are not that expensive. Those of us that need to measure above 600 volts with a DVM should use a HV probe. It is safer for both the HAM, and the DVM. Here is one on Ebay: Item number: 290080656981 Regards, Jim JKO -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.32/677 - Release Date: 2/8/2007 9:04 PM __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] New Year's Resolution-Getting Back on AM!
Hi Geoff, Do you continue to feed the antenna at the apex, or did you move it? What do you use for feedline (coax, ladderline, etc)?? Thanks. 73, Mark W1EOF -Original Message- From: ARS W5OMR [mailto:[EMAIL PROTECTED] Sent: Tuesday, December 26, 2006 4:15 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] New Year's Resolution-Getting Back on AM! On 12/26/06, Bob Scupp [EMAIL PROTECTED] wrote: Geoff- Thanks very much for all the great info on your improvements and additions to your G5RV. I don't think you understand. I'd -never- use a G5RV antenna. I've never heard one that I thought was worth of using for a transmitting antenna. Some people might argue that fact. If it works for them, fine. I've tried one before, and was never happy with it. The antenna I'm talking about, started as a 75m Inverted vee, apex'ed around 60'. In order to build the loop, I merely closed in the bottom of the loop. MY Loop is only 240~250 over-all feet long, that is 60' tall, 120' wide and 20 or so feet off the ground. Shaped like a Pyramid, or a Tri-angle, the antenna is called a Delta Loop, and it's a full-wave length on 75m. Works like a bomb on 75m, and even better on the higher frequency bands. IF I had the room, I'd do the same thing, for 160m, except I'd want the feed point to be -at least- 120' in the air. BTW- I fully agree with K4KYV's statement about the necessity of using a scope to monitor your AM signals. That's something else I will have to work on. When I get to that point I sure do have a great group of AMer's to guide me! Otherwise, you never know what's happening in your transmitter. There are others that say that monitoring your envelope pattern isn't good enough, if you have a scope... you should be watching the Trapezoid pattern, instead. Well, I've got a dual-trace scope... I just might start watching both ;-) Hope you (and everyone) had a great Holiday, whatever you celebrate, if you do. -- Operating your AM rig without a scope is like driving our car at night without headlights.(~K4KYV) 73 = Best Regards -Geoff/W5OMR __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] Coto Coil information
Anyone have a Coto Coil catalog, datasheet, or price list scanned? I've got a knob which I believe is Coto but I can't be sure. Will be grateful for ANY information or pictures of Coto Coil. 73, Mark W1EOF __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
RE: [AMRadio] RG8X
Yup, it does Jim. Makes sense that in the big cities they would have cell long before the rest of us. Thanks for clarifying it for me. 73, Mark W1EOF -Original Message- From: Jim Wilhite [mailto:[EMAIL PROTECTED] Sent: Friday, December 08, 2006 9:12 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] RG8X I was manager of a mobile radio service center in Dallas in 1983 when they turned on the cell service there. It was the first commercial system after Chicago and Washington. Each trunk mount radio had RG 58 attached to the antenna mount. About 3 years later they used the RG 8 types with the mini UHF connector. Does that fit your time frame Mark? It was around but not in common usage. Jim W5JO I agree with Jim except I'm not sure about the part RG-8X came out after cellular hit the market. I started using RG8X about 1980 or so. Not many people around here had cellphones until the mid-90s. It has always worked great for me on 50/144mhz. Also on a couple of 50ohm antennas. Most of what I do uses ladderline now. It's good for low-moderate power. 73, Mark W1EOF __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
RE: [AMRadio] RG8X
I agree with Jim except I'm not sure about the part RG-8X came out after cellular hit the market. I started using RG8X about 1980 or so. Not many people around here had cellphones until the mid-90s. It has always worked great for me on 50/144mhz. Also on a couple of 50ohm antennas. Most of what I do uses ladderline now. It's good for low-moderate power. 73, Mark W1EOF -Original Message- From: Jim Wilhite [mailto:[EMAIL PROTECTED] Sent: Friday, December 08, 2006 3:47 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] RG8X Well Rick, RG 8X came out after cellular hit the market. It is small and reasonable flexible. It is about the same size as RG 59 and has a bit more loss than RG 213. So it is perfect for UFH frequencies and installations in an automobile. Some of it has foam core around the center conductor and I would not use that at all. Should you kink or bend it too much, the foam will loose it circular shape allowing the impedance to change at that site. You can avoid that by following the installation rules of all wires. The bend radius of wires of any sort is 10 X the diameter. So if you have a .5 inch cable then the bend radius is 5 inches. According to the specs it will handle 1500 watts. If you do it, be careful of installing connectors. Should you overheat the connector the heat will deform the foam near it and that can cause problems. I personally don't like the stuff, but that is my personal preference. Jim W5JO Has anyone used this coax (RG8X) in lengths of about 100' for legal limit AM work? If so, how does it compare loss wide to the larger coax on 75 meters? Thanks, Rick __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
[AMRadio] 183D vs 303 ?
Anyone have experience with a National NC-183D? Anyone have a NC-303 for sale? I need a radio that had the National X-band that is compatible with my Johnson 6N2 converter. I was supposed to pick one up at Hosstraders but I found out tonight the guy thought I wanted the 183D which is B-S. Funny thing this is the SECOND time someone has promised to sell me one and then backed out of the deal. I suspect they both found a higher price for it elsewhere. Anyway, what's up with the NC-183D, and how would it compare to the NC-303? 73, Mark W1EOF __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
RE: [AMRadio] 183D vs 303 ?
According to one ad it has Calibrated amateur band spread for 6, 10-11, 15, 20, 40 and 80 meter bands which I assumed meant that it had bands which would act (bandspread-wise) like a ham only receiver. I've never owned one so I'm not familiar with the terminology. 73, Mark W1EOF -Original Message- From: Peter Markavage [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 9:02 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] 183D vs 303 ? NC-183D is general coverage. NC-303 is ham band only. Pete, wa2cwa On Mon, 2 Oct 2006 20:50:27 -0400 W1EOF [EMAIL PROTECTED] writes: Anyone have experience with a National NC-183D? Anyone have a NC-303 for sale? I need a radio that had the National X-band that is compatible with my Johnson 6N2 converter. I was supposed to pick one up at Hosstraders but I found out tonight the guy thought I wanted the 183D which is B-S. Funny thing this is the SECOND time someone has promised to sell me one and then backed out of the deal. I suspect they both found a higher price for it elsewhere. Anyway, what's up with the NC-183D, and how would it compare to the NC-303? 73, Mark W1EOF __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net __ AMRadio mailing list List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net
RE: [AMRadio] Legal-Limit tuner advice....?
Keep in mind that while the T tuners can match a wider range they also can be mis-tuned into a mode where a lot of power is consumed in the coil yet all looks good. This can't happen in a PI network for instance. It's a good reason to have one or more RF ammeters around for monitoring your antenna current. I prefer a link-coupled tuner like the MB for balanced loads, a parallel type tuner for end-fed wires and such, and a PI for coax-fed antennas. I can tune my Zepp from 80-10 including WARC bands with the MB. For 160 I can feed it as a T through a special link-matcher. You'll find many different opinions except that I think everyone agrees the MFJ tuners are very cheaply made. I have a 949 that I don't use that much... it's got flimsy components in it. Fine for say 100W I guess but no more. The switches feel flimsy too when you rotate them. I wouldn't recommend one that's for sure. 73, Mark W1EOF -Original Message- From: John Lawson [mailto:[EMAIL PROTECTED] Sent: Friday, August 18, 2006 12:52 AM To: [EMAIL PROTECTED] Cc: amradio@mailman.qth.net Subject: Re: [AMRadio] Legal-Limit tuner advice? On Fri, 18 Aug 2006, [EMAIL PROTECTED] wrote: In a message dated 1/12/06 8:31:16 AM, [EMAIL PROTECTED] writes: On Wed, 11 Jan 2006, [EMAIL PROTECTED] wrote: Quick and dirty, just try grounding one side of your ladder-line at the input end and feeding the other side off the single ended output of your ATU and see what happens. SWR figures might be better (but could also be worse). John, Did you ever try this? If so, what were the results? Yes, I did - results not good at all, antenna would not tune and the Transmitter complained at me bitterly... ;} I also built in a DPDT knife switch in the feedline after the tuner - it's mainly for grounding during t-storms, but I played around with various (semi-calculated) values of capacitors and coils... on 10 meters the use of various paralelled caps made improvements, but tuning became very critical, and there's nothing much that interests me up there - I *do* like to work 20M RTTY , and have yet to try PSK32 into the Valiant. I'm still gathering facts, and the Listmembers have been quite helpful - everyone likes the Palstars, but the big Ten-Tec also has impressive specs I intend on converting a broadcast transmitter for use in the shack, so the Tuner needs to be able to withstand 100% duty-cycle at Legal Limit. Ultimately I'll tune the feedpoint of the antenna itself, and just run 50-ohm line from the transmitter out to the doghouse if you will. Cheers John KB6SCO Who just shut the rigs off after a nice AM QSO on 80
RE: [AMRadio] Hardware for potentiometer
I knew a guy many years ago that produced pot for nuts. I think that's different. This was back in the day when HLR and EKV would be on 3885 and right after they signed you'd hear Led Zeppelin come blasting throuh the radio. 73, Mark W1EOF WN1PWA/WA1PWA at the time. -Original Message- From: John E. Coleman (ARS WA5BXO) [mailto:[EMAIL PROTECTED] Sent: Friday, August 18, 2006 4:22 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Hardware for potentiometer Maybe I could manufacture nuts for pots, SNIP
RE: [AMRadio] Packaging Radio Gear
As people have stated, it's a combination of both. People cared more about their work back then and probably took better care in how they handled stuff. There was less pressure to just get the stuff outta here than now I'm sure. Secondly it does not matter whether so much whether you use a particular material or not, it's HOW the materials are put together that matter. Someone in a reply said it doesn't matter how it's packed if it gets dropped six feet. I think you are stating my second point from a different angle. I wouldn't send a Valiant out my door unless I felt confident... yes, confident that it could withstand a six foot drop. Probably an eight foot drop. That's not unusual and std packing procedure for a business. It's not hard to do but it takes a little work and more than that it takes thought on how it should be boxed. I've sent hundreds of items around the world. Fragile glass items. Heavy radios. I never had one damaged in transit. ALl of those packages were expected to withstand at least a six foot drop. As an example, here is what I would do with a small-medium sized transmitter: 1. Remove the tubes. They get individually wrapped in bubble-wrap and shipped separately. Any other loose pieces get sent separately in another box. If you want you can in some case wrap that stuff up and put it inside but if you want to be sure, pack it separate. 2. Depending on the tranmitter, it's value, etc I might need to make a wooden support for the transformers. 3. Wrap this up in both directions with bubble wrap. The one with the bigger bubbles, not the small-bubble kind. Tape it good. There should be at least a couple of inches of bubblewrap on every surface. 4. Using bubblewrap or high-density foam fit this assembly into a box. Not a bad idea to put it into a heavy garbage bag and tape before it goes in the box. 5. Tape this box up. Tape it up GOOD. If heavy use strapping tape as I describe below. Now this is where many people would stop. It looks like it's ready to go, right? Well many people would ship this out but it's not ready. 6. Get ANOTHER, larger box. ALlow for 3-4 inches in every direction. In between the two boxes you need some cushion. I pesonally like peanuts but if you use them they must be packed DENSELY. You want the inner box to be able to move a bit, but not much. Pack the peanuts in there tight. Tape this box up tight. Then get your strapping tape and wrap two double bands of that in each direction, each band about 25% of the way in from the edge of the box. If the box is long then I'd add two more bands in that direction. The strapping tape will prevent the box from bursting should it be dropped on a corner for instance. It's very strong stuff. You're done. Now if the transmitter is really large, or extra heavy (say 80 or 100lbs) then you need to go to the next level and crate it. Basically you follow the steps above and then put that assembly into a box that is made of plywood with reinforced corners, etc. Making a suitable crate is somewhat of an art... a story for another day. If you follow those steps listed above you will be able to drop that transmitter 6-8 feet without any damage to the box or the transmitter. It will hit with a funny dull sounds and sort of bounce (which is what you want, thats' the energy being absorbed and deflected not transferred to the transmitter). 73, Mark W1EOF SNIP Could someone explain to me how radios were shipped back in the 50's so that they arrived at the dealers with no apparent damage. I wonder what the original packing was back then? SNIP
RE: [AMRadio] where to post For Sales
Paul - SELLER - It's way too much work for guys like Don. He can send to multiple lists using one email. With websites he'd need to login to each one, copy paste, etc, etc, etc. Then there's a matter of being considerate and maintaining all those posts. He doesn't have to go back and email all of the lists to let us know what was sold and what isn't. He would have to, or at least should on website posts. BUYER - I don't have time to go window shopping all around the net. If I'm looking for a specific something then I do. But the majority of things I've bought from Don (for instance) are because I became aware of them by reading his emails. I read each and every one of Dons emails because I trust him as one of the good guys. I've always been very happy with the description, price, packing, and the item coming from Don. So it's a great service to me to get these emails from the good guys. That's my perspective. 73, Mark W1EOF PS: It was questioned whether changing the subject line to reflect a new topic is part of the rules of this list. If not, it should be. It's been considered good etiquette since the beginning of the net (actually way before the net, it goes back to the BBS days). It just makes sense. How many time have you read a post whose subject line doesn't even remotely reflect the body text. Makes it hard to do that initial message triage. :-) I would like to understand why it is easier to sell via the mailing lists, Don. SNIP Paul/VJB SNIP
[AMRadio] Crimes and misdemeanors
Think of it this way. IF we can just be a little more intelligent than our equipment, gentlemen, then these discussions wouldn't need to take place. RULES are in place for a reason. All anyone has ever asked, is that they be adhered to. Hmmm... I wonder... who could be that said that just a few days ago on this very list? :-) What a classic Geoff!!! My humble little vote is that: 1. We keep the rules as they stand. They are there for us all, and work well. 2. That we keep our cool when the (obviously) best of us can make a mistake once in awhile. I did a few weeks back and had to apologize. It was handled offline and did not generate another blizzard of uninteresting posts. 3. That we remember the list is here for ENJOYMENT for all of us who share this wonderful HOBBY. We *all* make mistakes now and again. All that is really asked and required is that we make the very best effort to follow the rules. When one of us doesn't, a private *off-list* reminder would be best rather than a public tongue-lashing. It also would mean the cure was not worse than the mistake. Ok... that's my $.02 from a guy who can tell you with 100% confidence that despite my very best efforts sometime in the future I WILL make a mistake. Given my frailty as a human, I do appreciate your indulgences. 73, Mark W1EOF PS: I have to make note that the subject lines for all the messages about this breaking of the rules do not properly reflect the true subject of the body text. I believe this is a breaking of the rules.
RE: [AMRadio] Receivers
Rick, Considering that EVERYONE should have an R-390, and the fact that you don't intend on doing a lot of band cruising I think you have made an excellent choice. Not to sway you because it's an entirely different deal but... Last year I was ove a buddy's shack and heard his HRO-SR with matching National speaker for the first time. We were listening to some AM on 160M. It was hands-down the finest AM reception I've ever heard. I don't want to sound like one of the audiphool guys but it had a quality to it that was eerie. It sounded like we were listening to a QSO from 1950. That night the HRO-SR moved way up on my Want to have someday list. Other people have written me to concur. Seems to have something to do with the wide IFs or something. I don't know enough about the design to tell you. I can only say that it's something to behold. Even with that, I still think you can't go wrong with an R-390 for overall use. Good luck in your search. 73, Mark W1EOF -Original Message- From: Rick Brashear [mailto:[EMAIL PROTECTED] Sent: Monday, July 31, 2006 4:21 PM SNIP I hope to have all three one day, but for now I am hot on the trail of the R-390. SNIP Rick/K5IZ
RE: [AMRadio] good experience with shipping past 2 months
I unpacked it right there in the parking lot, not that I could have made a claim, since it was so poorly packed. However, i was very lucky, UPS *wants* you to believe that. I have heard from several people lately that pushed the point and got their damages from UPS. The legal fact is that if they accept the packaging on the input end they cannot later declare that it was not packed properly. Me? I just avoid UPS whenever I can and use USPS almost exclusively. YMMV 73, Mark W1EOF -Original Message- From: John Lyles [mailto:[EMAIL PROTECTED] Sent: Sunday, July 30, 2006 11:58 AM To: amradio@mailman.qth.net Subject: [AMRadio] good experience with shipping past 2 months I just finished receiving a series of large parcels with a completely disassembled 500 watt AM modulator, from East Coast to NM. Some were sent Fedex at my request, including the modulation transformer, a Stancor Polypedance. There were a pair of 810 triodes and some other transformers (fil, driver). The others went UPS. They were packaged extremely well, and I didn't see any damage to the parts, or packages. Maybe I was lucky, but I think there were 4 packages that came through just fine. I have shipped and received numerous things via UPS and Fedex out here over the years, and the only things that really got hammered were poorly packaged as well. So I think a lot of the responsibility lies on the sender and how much they care to overbox, foam pack, bubble wrap, remove heavy iron and ship separate, etc. I received an hp 8751A network analyzer last year, off epay, and it was poorly packed. I knew it was going to be trouble, as the shipper wouldn't communicate by email, and was a jerk about responding to my pleas for extra care packaging. Probably that I won the thing for a little over a grand instead of the typical $3 grand those things go for. The thing was only packed in styro peanuts, thats it - in a huge weak cardboard box. When I knew it was at the UPS warehouse, I drove there to pick it up after counter hours. They allow me to do that. I unpacked it right there in the parking lot, not that I could have made a claim, since it was so poorly packed. However, i was very lucky, as the thing had shifted to one edge of the box, but miraculously had not had the CRT smashed or the connectors bent on the front or back. There were some typical holes in the box via UPS, and they missed the thing. So I said a prayer, took it home, and plugged it in - fine. I am most wary of epay deals in which the shipper doesn't really know what he is selling, or the value of it to us. 73 John K5PRO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] Receivers
Rick - I think this can only be answered depending on what you are looking for in a receiver and what you intend on doing with it. Can we assume you want to listen to AM only, or mostly? How important is audio quality/fidelity to you? Are you going to listen to amateurs only or are shortwave broadcasting too? Are you going to head directly to a particular frequency or are you going to cruise the airwaves? Others may have more considerations but those are some of mine. 73, Mark W1EOF -Original Message- From: Rick Brashear [mailto:[EMAIL PROTECTED] Sent: Friday, July 28, 2006 8:50 PM To: AMRadio@mailman.qth.net Subject: [AMRadio] Receivers I know this may spark a geyser of opinions, but I am in need of assistance. I'm shopping for a new (new to me) receiver and I'm mainly looking at the SP-600 and R-390. I'm sure price will play a considerable role in what I get, but I want to get the most bang for my buck. What's your advice? Would you look at others? Are these as good as they are cracked up to be? Of course, I'm talking about tube type receivers only with AM as their primary mode. Rick/K5IZ __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
[AMRadio] The new FCC rules are here!
A bit of humor... please no flaming or arguing over this. Life is short. Enjoy radio. 73, Mark W1EOF ~~~ Dateline, Washington, DC The FCC today took what they described as an important new step to reduce QRM on amateur frequencies by setting standards for voice speeds. The docket #200-4U will become official in the Part 97 amateur regulations effective April First. Citing frequent complaints about long, boring conversations on the ham bands, especially 75 meters, the Commission moved to impose a new standard on voice operations requiring all conversations to be at a speed of at least 200 spoken words-per-minute. The Commission in its ruling was especially critical of what they called long winded, often endless conversations by old men talking about their prostate problems and other needs to get up and go to the bathroom several times during the night. FCC staffers say they have personally heard conversations about nothing that went for hours and tied up frequencies that could be used by faster talkers. Official Observer stations have received instructions to listen to suspect conversations and count the number of words-per-minute spoken. Those QSOs which fail to meet the minimum speed requirements will be noted and the operators involved will receive Official Observer Advisory Notices encouraging them to follow the rules or risk receiving notice of apparent violation citations from the FCC. Some hams in southern states complained the new regulation will impose a burden on them because they naturally talk more slowly than those up north. They are suggesting that frequencies be set aside for slow speed discussions concerning favorite countrymusic artists (particularly Don Williams), NASCAR, huntin' and feeshin' (particularly bass and brim). FCC says it may consider that in future rulemaking. In a separate press release, the American Radio Relay League said they are also concerned about two-meter operation where little is discussed except full quieting and items to be picked up on the way home. The League said that sort of thing is boring and is usually spoken very slowly as well, far below the 200 words-per-minute minimum. The League suggested conversations on how to help raise more money for League activities would be especially welcomed and will be encouraged. Future issues of QST will contain special pull-out sections containing recommended topics for on-air discussion to brighten up QSOs.
RE: [AMRadio] Re: shipping: Delta ASM-1
OK... I'll add my $.02 in: Don't use the UPS store. Or if you do, tell them EXACTLY how you want it packed and stand there and watch them do it. Don't trust them to follow your orders. Or... Pack it yourself. If you have to stand there and tell tehm each little step, why not just do it yourself. Pretty much any radio at all should be double-boxed. Not a bad idea to remove the tubes, or at least stuff a few pieces of bubble-wrap in there to keep them from popping-out. Then wrap the entire radio in bubble-wrap. Tape securely. Then wrap in the opposite direction with bubble wrap. Total thickness should now be at least a couple of inches. You want to make the bubble wrap fit the box snugly, so often you want to end up with a rectangular assy that fits in to the box. Tape this box well, but don't go crazy. Now take a larger box that supplies a good 3-4 inches in each dimension. Put some peanuts in there. Drop in box#1. Fille remaining voids with peanuts. There should be 3-4 inches in EVERY dimension around the inner box. Tape the outer box up tight. If the radio is heavy use thickwall boxes that have 3/8 thick or so walls. Use the packing tape that has fiberglass threads running through it. If a box has particularly long/large walls, reinforce them with pices of carboard cut to fit and glued in place. You may need to get creative to find packaing materials. And your customers may need to pay a little more for shipping if they want their item to be in one piece when it arrives. If done correctly you can drop this package from a height of 5-6 feet with NO damage. If the radio is heavy, say 70 or 80lbs you need to go even heavier. Over 100lbs really needs crating. You take the double-boxes I just described and you put that inside a playwood box you constructed. That box needs to be build well and reinforced. It's not that hard but you have to understand a bit about the physics of what happens when your package gets tossed around. I've shipped some pretty heavy items around the world and have NEVER had one damged in the slightest. I consistently get high marks from my customers for how I package their items. It just takea a little care and thought. I'd be glad to answer any questions that you have on specific items. 73, Mark W1EOF -Original Message- From: I COLLECT TRAINS [mailto:[EMAIL PROTECTED] Sent: Saturday, July 22, 2006 5:03 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Re: shipping: Delta ASM-1 Guess i'll be packing it myself :) probably have fedex pick it up from the house.
RE: [AMRadio] fs: Delta ASM-1
THe problem with that Dave is that it does not cushion the electronics the same way a nice thick layer of bubble wrap does. I have used it on the outer layer and it works great there. But I would not want a piece of my electronic gear bouncing it's way from you to me with no cushioning other than that hard sytrofoam board. Case closed for me! 73, Mark W1EOF -Original Message- From: david knepper [mailto:[EMAIL PROTECTED] Sent: Saturday, July 22, 2006 7:57 PM To: Discussion of AM Radio Subject: Re: [AMRadio] fs: Delta ASM-1 Jim, I would highly recommend going to a lumber yard (Home Depot) and buy a sheet of styrofoam insulation board. Cut and form around the unit to be shipped. Thanks Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST - Original Message - From: Jim Wilhite [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Saturday, July 22, 2006 7:28 PM Subject: Re: [AMRadio] fs: Delta ASM-1 Great idea Dave if someone near you can do it. In rural Oklahoma, wood chips is the only thing available except bubble wrap from Wal-Mart. Not to make fun of rural Oklahoma, but it is a funny, strange place. 73 Jim W5JO If you haven't noticed, then, see how most if not all electronic equipment is packed - with preformed or molded styrofoam not bubble wrap or peanuts. Case closed! Dave, W3ST __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] fs: Delta ASM-1
I agre Brett. You use the same methodology as I do. The outer box can be banged to death but the inner box, and the cushioned gear on the inside stays in once piece. 73, Mark W1EOF -Original Message- From: Brett gazdzinski [mailto:[EMAIL PROTECTED] Sent: Saturday, July 22, 2006 8:18 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] fs: Delta ASM-1 I have sold a lot of stuff and shipped it without problems lately. I pack it in a bag (anti static) then in a box padded to survive shipping, then put that box in another padded box, and use FedEx mostly. Some report the outer box being in rough shape, the inner box ok. Bubble wrap, foam, peanuts, it all works if there is enough of it. Brett -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Wilhite Sent: Saturday, July 22, 2006 7:29 PM To: Discussion of AM Radio Subject: Re: [AMRadio] fs: Delta ASM-1 Great idea Dave if someone near you can do it. In rural Oklahoma, wood chips is the only thing available except bubble wrap from Wal-Mart. Not to make fun of rural Oklahoma, but it is a funny, strange place. 73 Jim W5JO If you haven't noticed, then, see how most if not all electronic equipment is packed - with preformed or molded styrofoam not bubble wrap or peanuts. Case closed! Dave, W3ST __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb
RE: [AMRadio] RCA AR-77 or RCAF GR-10 Receiver
Dave Ed - Looking through the year of QST 1940 I find that RCA ran full-page ads for the AR-77 from March through December. I don't have 1941 QST and I have not had a chance to look at 1939 yet. Here are a few of the ads which ran in 1940: http://www.hamnutz.com/w1eof/ar77/ 73, Mark W1EOF ~ The full-page ads for it --- around 1940-41 in QST --- make for interesting reading. One VERY rare option for it was a HUGE bass-reflex loudspeaker assembly. Most impressive. SNIP ~73~ Eddy VE3CUI - VE3XZ
RE: [AMRadio] Stuff for sale...update.
Brett - FWIW you CAN sell it to another licensed ham. The buyer is responsible to ensure that it meets emission standards, etc. A few years ago I put a CB style amp on eBay. I made it clear in the auction listing that the buyer had to prove to me he was a licensed ham, and that he was responsible to make sure it met specs. I even suggested that he build a filter for the output and not over-drive it and it would be fine. Anyway I get an email from a guy telling me I'm violating the FCC rules. I tried to explain to him that since I'm not a company producing amps, it's very similar to me selling him a heatsink, some toriods and a few transistors. It's HIS responsibility. That's why we're SUPPOSED to know what we are doing when we build, repair, and operate our radios. Anyway... To make an agonizingly long story short, after many back and forths with him and several past and current FCC employees it turned out I was correct. He sent me a final email saying I was correct but then called me some nasty names. All that said I would probably agree that it's best to keep it off of eBay since they don't have the expertiser to determine what's legal and what is not. So they might let it go sailing through, or they might take it down and give you grief. 73, Mark W1EOF -Original Message- From: Brett gazdzinski [mailto:[EMAIL PROTECTED] Sent: Monday, July 03, 2006 10:04 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Stuff for sale...update. SNIP Galaxy DX99v, 15 watt am cb/10 meter mobile, does AM, ssb, fm, has freq readout along with channel numbers, and other CB stuff, $200.00. Cant list this on ebay, FCC does not allow it to be resold! SNIP
[AMRadio] A freq'ing mess
I'm trying to pick a date and a set of frequencies for a club to have a QSO party. Do any of you know any online references for either/or frequency and date? I think date alone is not too hard, I'm sure there are calenders at arrl.org and other places. I'm more concerned about picking some bad frequencies that will already be in use at that time. 73, Mark W1EOF
[AMRadio] Info Needed: General Transformer Corp
Got some transformers and chokes from General Transformer Corp from Chicago. Need specs on them. I can supply list of P/N if you got a catalog. These are nice transformers... look similar to Kenyon iron. This company is from Chicago, not the current one from Texas. They also produced some transmitter kits in the 1930s. Can anyone help? 73, Mark W1EOF PS: While I'm at it... need info a Kyle transformer too.
RE: [AMRadio] Amphenol Coil Forms Wanted
Hi Scott - Below is an email from Larry Baker, WB5OFD. He makes reproductions of those coil forms. 73, Mark W1EOF ~~ WB5OFD COIL FORMS These forms are modeled after the American Phenolic Company (APC) Polystyrene coil form Catalog No. 24-5P which was used by Ameco for their AC-1 transmitter and also for the Allied Knight Ocean Hopper receiver. My forms are hand made using 1/8 inch wall thickness Polycarbonate hollow tubing and have the standard five pin base pattern using nickel plated pins. There are three pieces to each assembly; Base pin disc, Coil form body and the Collar. Polycarbonate liquid cement is used to assemble the component pieces together. Each form is approximately 1-1/4 inches in diameter and 2-1/4 inches in height not including the height of the base pins. There is a 1-1/2 inch collar at the top of each form to assist in inserting and extracting the coil from its socket without disturbing the wire coil itself. The forms are not predrilled for the entrance/exit of the coil winding. Should you wish to purchase these forms please keep the following in mind: 1. Polycarbonate is easily scuffed or scratched. (*Note: but no more so than the original AMECO forms) 2. There will be slight (thousandth's of an inch) variation in each coil. It would takean inordinate amount of time and waste of material to produce a large number of theseforms exactly the same since they are individually HANDMADE. 3. Due to sizing tolerances of the inside and outside diameters in the Polycarbonate tubing, as a result of the Tubing Manufacture's process, it is not always possible to obtain a snug fit of the collar at the top of the coil form. Because of this, a small air gap may exist and the cemented joint can assume a milky colored look to it; however, it still a strong joint. 4. During final assembly I mix and match component pieces to minimize this effect and also take as much care as I can to prevent cosmetic blemishes. If you wish to place an order please Email me at: [EMAIL PROTECTED] Pricing per form is $10.00 each plus Shipping and Handling for orders of four forms or less. For orders of five or more forms, pricing remains $10.00 each; However, I will pay the handling and shipping cost which will be by U.S. Postal Priority Mail. Thank you for your consideration. 73 Larry Baker WB5OFD
[AMRadio] 576A rectifiers
Anyone need a pair of United Electronics CUE-576A rectifiers? If so please contact me DIRECT, NOT ON-LIST. Thanks! 73, Mark W1EOF
[AMRadio] How the reply button works
Don - This seems to come up on every list I belong to ( 35) every so often. It's not so much a bug but a choice. It also is NOT turning a reply into a reply-to-all. When you click the reply button it can only go one of two ways. To the list (the source of the email to you), or to the poster of the message to the list. It can only go one way or the other. I would contends that it is in the most favorable position. I'd guess that most of the time when someone replies, they want to reply to the list and not to the individual that posted the message. I just checked: All lists I belong to except one default to replying to the entire list when you hit the reply button. All the Yahoo lists. The LWCA.ORG list. The only one that does not, the one that's different is the GlowBugs list. 73, Mark W1EOF -Original Message- From: Merz Donald S [mailto:[EMAIL PROTECTED] Sent: Sunday, June 11, 2006 2:19 PM To: Discussion of AM Radio Subject: RE: [AMRadio] Sellers and Buyers on this list...READ THIS I will do this. But it must be recognized that this feature is a bug. No other list anywhere on Earth operates by automatically making every REPLY into a REPLY-TO-ALL. SNIP
[AMRadio] BC-223: PL-150s Cable needed
OK... I now have two different sources for a pair of good 801a triods for my BC-223. I'm cleaning up the dynamotor (even though it's NOS the grease is dried up) and that should be reasdy to go. So the only thing I need is the cable from the dynamotor to the BC-223. It's a heavy rubber cable with... I think 7 conductors in it. The connectors are the PL-150. I can come up with a modern cable if I have to but it would be real nice to have the correct connectors on it. Anyone got a pair of PL-150s??? 73, Mark W1EOF
RE: [AMRadio] Good Hams
With all this talk of tubes and good will toward men... If anyone has a pair of 801As they want to sell or trade, I need a pair to get my BC-223 on the air. It's cleaning up nicely and very soon the 801s will be the only thing holding me up. Thanks! 73, Mark W1EOF
RE: [AMRadio] Relay
Rick - That's a latching relay. It's bi-stable with no power applied. Basically it is magnetically balanced such that when you apply power you flip the relay to the other state. Magnetics then hold it in that state. It may be a touch one to find. So you have two choices: 1. Use a non-latching relay. I dont know what the ramifications are here. I assume they wanted the relay to remember it's state with power off for a reason. So you would need to determine how well a non-latcher would work for you. 2. Use another latching relay. Definitely won't plug-in to the same spot. If it's tight and/or unsightly to replace you might be able to install a regular PB relay in that socket and drive that relay with a latcher that is installed in a hidden location. 73, Mark W1EOF -Original Message- From: Rick Brashear [mailto:[EMAIL PROTECTED] Sent: Thursday, June 01, 2006 12:29 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Relay Thanks Geoff... unfortunately, I had looked on those sites and nothing turned up for me either. Actually, the info on the case of the relay states it is a reversing polarity latch. These are the two little relays that control which of the three crystals will be used in the oscillator. Rick W5OMR/Geoff wrote: Try here, Rick... http://relays.tycoelectronics.com/pnb.asp Heck, for that matter, look at http://www.google.com/search?hl=enlr=q=%22Potter+and+Brumfield+r elay%22btnG=Search I searched for the SL4349 in Google, but came up empty, as far as relays go. -- 73 = Best Regards, -Geoff/W5OMR __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.8.1/354 - Release Date: 6/1/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.8.1/354 - Release Date: 6/1/06
[AMRadio] (2) 801As needed
Anyone on the list have, or know of a source for a couple of 801As? I'm getting a BC-223 on the air and got everything but those tubes. Cash or willing to trade. 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.8.0/352 - Release Date: 5/30/06
RE: [AMRadio] Oscillator Filament Voltage change and frequency drift
I've lost track of whoever was playing with this... I have three 3AU6 for whoever, just pay for postage. 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.6/337 - Release Date: 5/11/06
RE: [AMRadio] remote coax switch
I would guess (only a guess) that each one of those pins is a separate relay coil, powered against the shell/ground. Using an ohmmeter measure from each of those pins to ground, they should be approx. the same resistance. Apply power from a variable supply between a pin a ground. Bring the supply up slowly and check the connection between the common and the outputs at each step. I think you'll find that at about 20 volts or so the connection will be made. 73, Mark W1EOF -Original Message- From: W5OMR/Geoff [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 10, 2006 9:37 AM To: discussion of AM Radio Subject: [AMRadio] remote coax switch I've got a commercially made three position remote coax switch, that I'd like to get more information on, if someone has it. Made by Amphenol Model number 3BNI20R10A-7 (don't know if that I is a 1 or not) Serial: 6419 28 Volts DC Has 5 connections on it 3 BNC (outputs) 1 Type N Female 1 bluk-head with 3 pins. Does this mean that if you pulse 28v on one pin, it goes to the right, and if you pulse the other 28v pin, it turns to the left, with the last pin at ground potential? Pins are marked A B C other indentifiers are stamped on the unit... 300-81128 IRM5895-717-2565-FX3X those are stamped on, so may be a local part number, wherever it came from. Any help? Google wasn't. -- 73 = Best Regards, -Geoff/W5OMR __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.5/335 - Release Date: 5/9/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.5/335 - Release Date: 5/9/06
[AMRadio] Ranger/National wanted
Hey - Anyone around New England or NY have a Johnson Ranger or Ranger II they want to get rid of? How about a National 300 or 303? I'm in RI but I can travel for radio. 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.5/321 - Release Date: 4/21/06
[AMRadio] Time machines for your parlor
I was recently given a bound set of QSTs from 1931 to 1942. Boy oh boy, in addition to the various email lists I now have another distraction keeping me from DOING stuff. How wonderful it is to be able to sit down in an easy chair and page through ham history. Not just the articles either. I check out the section news from Rhode Island looking for mentions of my Dad or his buddies from the 1930s! It's very cool to see what issues were significant to a ham back then... and what wasn't. During a move about ten years ago I stupidly dumped most of the magazines I had been collecting. None were this old, but I had QST pretty much consistently from 1971 onward. (Also had about 12 years of BYTE, now worth big bucks). I was thinking that I would get the CD-ROMS and be happy with those. I was very tired at the time doing a lot of moving as I combined two families. I also dumped a bunch of transformer iron too. sigh I started regreting it about a year later and have ever since. I understand that for some, downsizing is a necessity that cannot be avoided. But in my case it was voluntary. Anyway... if you have not done so in awhile, take a few minutes to peruse some really old magazines or books. Get a nice cup of your favorite beverage, a comfy chair, and some quiet time. Someone on a list was looking for a time machine... This is the closest thing we got. 73, Mark PS: I'm not anti-CDs either. Searching for info and finding it is MUCH much easier, faster, and more complete using the CDs. But they lack the feel, smell, and soul of an old magazine. YMMV -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.4/319 - Release Date: 4/19/06
RE: [AMRadio] antenna tuners
Don All, I'm about to dig a trench in my yard to run some coax and control cables to the back, in the bushes, our of harms (XYL eyesight) way. I'm curious... 1. Did you direct-bry the coax? I've had people tell me to go ahead and bury it. They say that by the time the coax deteriorates I should have replaced it anyway. On the other hand, you can buy poly hose pretty cheap. That would keep the lines dry and protect them from an errant shovel or two. 2. How bad is it to run various lines together in a tube. Would I be better off to run them at least a few inches part to minimize inductive pickup? 3. Of course it would need to be separate but: Has anyone run ladderline underground? Theoretically it's possible but my intuition says Don't do it! 73, Mark W1EOF -Original Message- From: Donald Chester [mailto:[EMAIL PROTECTED] Sent: Thursday, April 20, 2006 12:58 PM To: amradio@mailman.qth.net Subject: RE: [AMRadio] antenna tuners SWR is not all that bad either as long as the transmitter sees a match, especially the solid state rigs...And no, high swr on a feed line will not cause it to radiate. What causes feed line radiation is an unbalance between the two wires in the feed line. High SWR on coax line will cause a little more loss in the feed line due to the higher currents involved across the lower impedance of the coax. That is why when using open wire line that is 400 to 600 ohms, there is much less loss. The same power across a higher impedance means less current and less current going through the feed line wire means less power loss. Another factor causing loss with a high SWR is dielectric losses at the recurring high rf voltage points along the line. At low impedances, it is the resistive loss in the wire, and at high impedances, it is dielectric losses that combine to cause signal loss. But SWR is much, much less critical than most hams have been led to believe. An antenna tuner just matches the impedance seen at the transmitter end of the feed line to the 50 ohm transmitter output. If there is high swr on the feed line, any power reflected from the antenna is not wasted it is just re-reflected back to the antenna and eventually gets radiated. At HF even fairly high swr on coax lines does not cause excessive loss. My 160m. vertical uses a 140' run of buried RG-213 from the shack to the antenna tuner at the base of the tower. I set the L-network to match the tower 1:1 SWR at 1900 kc and locked it down. The SWR is about 2.5:1 at 1800 kc and the same at 2000 kc. I have measured the rf power input to the tower using a General Radio antenna impedance bridge and thermocouple rf ammeter, and at the same DC input power to the final amplifier, I could not detect any significant difference in rf power at the antenna end of the feedline, across the entire band. Of course at each point I had to re-measure the base impedance of the tower, note the rf ammeter readings, and re-calculate per ohm's law, so I do not guarantee precision measurements, but the ballpark power was consistent across the band, with no evidence of excessive loss at the top and bottom edges Don k4kyv. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.4/319 - Release Date: 4/19/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.4/319 - Release Date: 4/19/06
RE: [AMRadio] HR-10 problem
My HR-10B doesn't do it Alan, so it's not inherent in the design. As Brett suggested, look for voltages that are out of spec. 73, Mark W1EOF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Monday, April 10, 2006 9:49 AM To: AMRadio@mailman.qth.net Subject: [AMRadio] HR-10 problem Hi, I am running an HR-10 RX in my shack outside and am wondering how to cure an annoying fault. Or, this may be bad design, but I don't remember this from when I was a kid. When i turn up the RF Gain, and end up close to full on it, I get a shift down in frequency of the CW note. So far that I have to retune the BFO to get it back. The RF Gain is in series with the Cathode of the first RF stage of the RX. perhaps a Zener diode to cure it? And if so, I guess I should measure the voltage someplace and clamp with a zener, but then again, I would be modifying the whole circut. Anyone know how to fix this? Best 73, Alan __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/306 - Release Date: 4/9/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/306 - Release Date: 4/9/06
[AMRadio] AM filter for an SB-300
Hi All - Probably a long-shot, but I gotta ask: Do any of you have experience either making a AM bandwidth filter, or modifying a SSB filter for a SB-300 or similar receiver? I have one article on modifying a SSB filter by installing four new crystals. Given the expense of buying four crystals I've been re-thinking it. It seems that since I'm looking for a broad response that I might be able to build a simplified version? Or other idea? The AM filters are starting to look less expensive than they did previously. :-) 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/305 - Release Date: 4/8/06
RE: [AMRadio] : BC 610 needing POWER 220VAC
I believe it's a little more complicated: 1. If you want to use two circuits, one from each side/phase then you you should use a double breaker so that if one side blows the other one does too. 2. I would fuse each side of the circuit at the radio. (Add a secondary fuse for the plate supply primary). 3. I would provide some protective circuitry (relays) such that if you lose the low-level circuits it kills the plate supply as well. Bad for the radio and potentially dangerous if what appears to be a dark/dead radio in fact has live B+. That's my $.02 73, Mark W1EOF -Original Message- From: Rbethman [mailto:[EMAIL PROTECTED] Sent: Saturday, April 08, 2006 12:13 PM To: Discussion of AM Radio Subject: Re: [AMRadio] : BC 610 needing POWER 220VAC All, There is ONE overriding issue to think about carefully here! The SINGLE 110VAC feed to the BC-610, ALSO goes through a SINGLE front panel fuse! IF someone desires to use TWO disparate 110VAC feeds, FUSE THE SECOND ONE ALSO! Bob - N0DGN John Coleman ARS WA5BXO wrote: I really have no idea if it is wired for 110 or 220. I know that the Plate XFMR is 110VAC and if it were me I would wire a separate primary circuit for the plate XFMR. Just for the load balance. If the filaments and low voltage stuff is all run from side A of a 220 circuit and the plate XFMR from side B then it is feasible that the filaments and low voltage supplies would be more stable. And the pilot lamps would not dim as much. That is important when you're trying to write in the log while talking on the air by the light of pilot lamps only, HIHI. John, WA5BXO Bob Bethman - NØDGN +--+ | NØDGN AMRadio Manassas, VA|REAL Tube Radio and AM| +---+--+ | Manassas Radio - Home of Homemade Kielbasa Pirogi| +---+--+ | Bob Bethman\\\|/// The absence of a danger | | rbethman(at)comcast.net \\ ~ ~ // signal does *NOT* mean | | (/ @ @ /) that everything is OK | +-oOOo-(_)-oOOo+ | http://home.comcast.net/~rbethman| | 1 BC-61ØI w/BC-614I,1 T-213/GRC-26 w/BC614I 1 '51 Collins R-390A | | SP-600/NR Type 159, Heath DX-60, Apache, Mohawk, SX-101, HT-32A | +-.oooO---Oooo.+ | () ()| | \ ( ) / | | \ _) ( _/ | +--+ | Amateur Astronomer - Celestron Nexstar 8 - Megrez 80mm SD II | | 12 f5 Dob coming soon! Being built | | 38 Deg 46'48.62' N - 77 Deg 28'26.89 W | +--+ | Opinions expressed are that of my own and do not necessarily | | coincide with or represent those of ANYONE else | +--+ |ALL E-mail received and sent scanned by AVG Norton System Works | __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/304 - Release Date: 4/7/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.0/304 - Release Date: 4/7/06
RE: [AMRadio] 10 Meter AM Frequencies
-Original Message- From: Donald Chester [mailto:[EMAIL PROTECTED] Sent: Wednesday, April 05, 2006 4:51 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP The 7 watts on AM wouldn't be bad when 10m is open. But the thing has terrible audio. I looked at the schematic and couldn't figure out how to modify the audio so it wouldn't be so tin-can sounding. Has anyone else figured out how to do this? Of course you could always run a leenyar to boost the power. Don k4kyv Don - I have heard that the microphone is a big part of the problem. I'm going to mess around with mine to see if I can improve the audio. Then again, I never had a problem because I used it on CW/SSB. But it might be worth a try since it's external to the radio which makes it easy to do/un-do. 73, Mark W1EOF -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/301 - Release Date: 4/4/06
RE: [AMRadio] 10 Meter AM Frequencies
In addition if you're interested in knowing if the band is open, don't forget to tune through the beacon portion of the band approx 28200 - 28300. 73, Mark W1EOF -Original Message- From: Rev. Don Sanders [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 10:46 AM To: Discussion of AM Radio Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP Much of the QRp activity on 10 was on 29.060 in years past. I often monitor 29.060 but don't hear much Others monitor 29.00. Healthfully yours, DON W4BWS -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/300 - Release Date: 4/3/06
RE: [AMRadio] k1man fined
I don't disagree with you Vince. Or with all that has been said about K1MAN on this list. I think we all miss the bigger issue: K1MAN *WANTS* to get caught. He wants to be the center of attention and like many children he will do whatever he feels is necessary to get that attention. He was going to push issues until the FCC responded. I can, and do respect amateurs who disagree with me on issues related to radio, etc. I have no respect for K1MAN. His childish and selfish activitites makes us all look bad and should be shutdown permanently ASAP. 73, Mark W1EOF -Original Message- From: vince werber [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 11:55 AM To: Discussion of AM Radio Subject: Re: [AMRadio] k1man fined Let's face the facts about this K1MAN issue... SNIP In this case K1MAN earned the fine... 73 Vince ka1iic -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/300 - Release Date: 4/3/06
RE: [AMRadio] 10 Meter AM Frequencies
Boy that's the truth. A few years back I had my HTX-100 in the car. With that 25W I worked the world. Doesn't take much power at all. 73, Mark W1EOF -Original Message- From: ronnie.hull [mailto:[EMAIL PROTECTED] Sent: Tuesday, April 04, 2006 2:30 PM To: Discussion of AM Radio Subject: Re: [AMRadio] 10 Meter AM Frequencies SNIP 4 years ago when propogation was still decent, I worked 13 european countries on ten am with a barefoot ranger. you just don't need a great deal of power to make good contacts on ten meters Ronnie - W5SUM -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.5/300 - Release Date: 4/3/06
RE: [AMRadio] FS: Radio Books List Four--Great Tube Books
Don, I'd like: RCA HB-3 Transmitting Tube Section. This has been carefully added to up through about 1965. Nice. $20 Add it to my pile. We'll square-up this weekend. 73, Mark W1EOF -Original Message- From: Merz Donald S [mailto:[EMAIL PROTECTED] Sent: Thursday, March 30, 2006 9:38 AM To: 'Amradio (E-mail); 'Baswaplist' (E-mail); 'Glowbugs (E-mail) Subject: [AMRadio] FS: Radio Books List Four--Great Tube Books For Sale: Radio Books List Four. All prices plus $2 media mailing. Shipping cost combined for multiple books. RCA HB-3 Transmitting Tube Section. This has been carefully added to up through about 1965. Nice. $20 RCA HB-3 Receiving Industrial Tube Section. Not updated past about 1959. $12 Electronic Circuits and Tubes, by The Electronics Training Staff of the Cruft Laboratory of Harvard University, 1947. Massive and detailed work-almost 1000 pages in a single hardback volume-covering topics such as Measurement of Circuit Elements, Networks and Impedance Matching, Transients and Coupled Ciruits-- along with much, much more. The analysis is both graphical and mathematical with a very well-written text. The most impressive volume on tubes I have ever seen, bar none. $60 VHF Handbook For Radio Amateurs, Bill Orr, W6SAI, Radio Publications, 1974. Paperback, excellent. $5 Richard Johnson, How to Use Signal and Sweep Generators, Rider, 1953, excellent. $7 Joseph Carr, The Complete Handbook of Amplifiers, Oscillators and Multivibrators, Tab Hardback, 1st ed., 1981. $10 Paul C. Smith, Know Your Oscilloscope, Sams paperback, 1963, excellent. $5 Mannie Horowitz, Troubleshooting Electronic Test Equipment, Tab books, 1986. Comprehensive 440 pages-all solid state. $12 Marcus and Horton, Elements of Radio, Volume I only, 1943. Prentice-Hall hardback. Companion Theory book for Elements of Radio Servicing by Marcus and Levy. 300+ pages. $8 Quartz Crystals For Electrical Circuits, Raymond A. Heising (Bell Labs), D. Van Nostrand, 1946. 550 pages. Hardback. Fabulously thorough. Deep math and theory all the way to detailed photos of the manufacturing process and detailed discussions of variances in manufacturing. Just plain awesome. $45 Fredrick Collins, The Radio Amateur's Handbook, 10th ed., 1957. 350 pages. Lots of photos and partial schematics for Heathkit gear. Ex-library with plastic-coated dust jacket. Excellent. $12 Hertzberg Collins, The Radio Amateur's Handbook, 15th ed., 1983. 375 pages. Material somewhat dated by the time of this edition. $10 Keith Henney and James D. Fahnestock, Electron Tubes in Industry, McGraw-Hill hardback, 3rd ed., 1952. 330+ pages. Great stuff. $18 each 2 copies available Herbert J. Reich, Theory and Application of Electron Tubes, 2nd ed., 1944, McGraw-Hill. 700+ pages. Excellent discussion of power supplies and other VT applications. $28 each. 2 available. Samuel Seely, Electron Tube Circuits, 1st ed., 1950, McGraw-Hill hardback. 520+ pages, superbly comprehensive. Detailed coverage f amplifiers, oscillators, AM, FM, and much more. $35 Thanks for looking. 73, Don Merz, N3RHT The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator.(16b) __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.3/296 - Release Date: 3/29/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.3/296 - Release Date: 3/29/06
RE: [AMRadio] FS: Radio Books List Four--Great Tube Books
Sorry to all. Me bad. 73, Mark W1EOF -Original Message- From: W1EOF [mailto:[EMAIL PROTECTED] Sent: Thursday, March 30, 2006 9:58 AM To: Discussion of AM Radio Subject: RE: [AMRadio] FS: Radio Books List Four--Great Tube Books Don, I'd like: RCA HB-3 Transmitting Tube Section. This has been carefully added to up through about 1965. Nice. $20 SNIP -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.3/296 - Release Date: 3/29/06
RE: [AMRadio] Relay 101
Although simplistic, those papers are well written. My only caveat is that they are written for electromechanical relays. Reed relays (my area) have some characteristics taht are very similar and some that are quite different. Nice find Jim. 73, Mark W1EOF -Original Message- From: Jim Candela [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 22, 2006 12:13 PM To: Discussion of AM Radio Subject: [AMRadio] Relay 101 Hi All, The Tyco folks have some interesting application notes about relays that fit into an earlier thread on this reflector. Check out the following links: Relay Coil Back EMF protection: http://relays.tycoelectronics.com/app_pdfs/13c3311.pdf Relay Contact Arc suppression: http://relays.tycoelectronics.com/app_pdfs/13c3236.pdf Other Relay and general switching topics: http://relays.tycoelectronics.com/application.asp We can use some of these ideas on our AM rigs Jim WD5JKO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.6/287 - Release Date: 3/21/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.6/287 - Release Date: 3/21/06
RE: [AMRadio] Relay 101 Reed Relays
Well like machanical relays it's very much about the contact materials. In the relay business we spend a lot of time working on contact materials, plating, etc. So it's hard to illuminate too much without knowing the particular device in question. What's a reed-relay? A relay made from a reed-switch inside a coil. A reed switch has two ferrous blades which have had a contact material deposited on the ends making up the contact. When the coil is energized the steel blades of the reed switch deflect a very small amount and close the contacts. That's it. A few thoughts: 1. Reed relays tend to be fast. Regular reeds close in less than a millisecond, mercury reeds about 2ms. 2. If you don't know what the coil spec is, hookup the coil across a variable power supply. Adjust the meter upward slowly until the contacts close (determined by a DMM across them). Bring the coil voltage to 0.00 and repeat a few times. This is call the Operate voltage. Normal operate voltage for a reed relay is 50% overdive. So your typical 5.0vdc relay will operate about 3.6 volts or so. Most relays are find at 100% overdrive, it doesn't hurt the relay. 3. Contact life is all about the materials. When designing a generic multi-purpose reed relay they choose a reed switch which can handle moderate voltages and loads. In very broad general terms if you were interested in very very low contact resistance you use a soft contact surface like gold. This is terrible for higher voltages or currents though. For those you want something really hard. 4. If you have a mercury or a mercury-wetted relay make sure it's oriented properly. These relays have a blob (or at least some small balls) of mercury in them. You don't want that mercury floating around and shorting the contacts when the relay is supposed to be off. They will sometimes have an arrow on them but not always. 5. Form-B reed relays rely on a magnet to hold the switch closed. When you apply voltage to the coil the magnetic force overcomes the magnet and opens the switch. 6. Form-C reed relays are made with a form-c switch. The blade is held against the N.C. contact via mechanical force. Applying coil voltage results in magnetic force that moves the blade from the N.C. contact to the N.O. contact. It relys on mechanical force to return the switch to the resting state. 7. Reed relays can have two types of shields in them. One is a magnetic shield on the outside of the coil. This helps prevent interaction when the relays are mounted very close to one another on a PC board. The other is a RF shield inside the bore of the coil. This is to provide a constant impedance to the circuit. This is very, very important to many reed relay customers. For instance automatic test equipment (ATE) manufacturers are big consumers of reed relays. A modern semiconductor tester can use 10,000 relays. They want to test fast device quickly. So they are very very concerned with the RF performance of the device. Many years ago I started working for a reed relay company. I was naive, thinking How complicated can these things be?' Ha! Now I'm older and wiser and understand that there is a wealth of knowledge and complexity in many things we deam simple. Reed relays incorporate electronics, physics, magnetics into their design and use. TO design and test them you work with voltages from microvolts to thousands of volts. .001 ohm to 10^12 ohms (million-megohms). I'm still learning today after twenty years. Relay manufacturers are constantly pushing the envelope to make devices which not only perform better but are much smaller and less expensive. I have recently seen reed relays that are approximately the same size as a 1/2W resistor! I don't know what else to say in general about them. I'll be glad to answer any questions on this subject. I hope this gives you some food for thought. 73, Mark W1EOF -Original Message- From: Mark Foltarz [mailto:[EMAIL PROTECTED] Sent: Thursday, March 23, 2006 12:24 PM To: amradio@mailman.qth.net Subject: RE: [AMRadio] Relay 101 Reed Relays Mark, Would you elaborate on some of the subtleties of the reed relay characteristics? They are so prevalent now in many tuners and even my Philips RF gen that it would be interesting to learn something about them besides the basic functionality. TNX de KA4JVY Mark --- W1EOF [EMAIL PROTECTED] wrote: Although simplistic, those papers are well written. My only caveat is that they are written for electromechanical relays. Reed relays (my area) have some characteristics taht are very similar and some that are quite different. Nice find Jim. 73, Mark W1EOF -Original Message- From: Jim Candela [mailto:[EMAIL PROTECTED] Sent: Wednesday, March 22, 2006 12:13 PM To: Discussion of AM Radio Subject: [AMRadio] Relay 101 Hi All, The Tyco folks have some interesting application notes about relays that fit into an earlier thread on this reflector
RE: [AMRadio] Relay 101 Reed Relays (white papers)
Below are links to some white papers that explain reed relays much better than I can. Enjoy. 73, Mark W1EOF ~~~ How a reed switch operates: http://www.cotorelay.com/Reed_Switch_Operation_Methods.pdf Glossary of reed switch terms: http://www.cotorelay.com/Glossary.pdf Switching considerations of contacts: http://www.cotorelay.com/Switching_Considerations.pdf RF Characteristics of reed relays: http://www.cotorelay.com/RF_Parameter_Measurement.pdf Contact Resistance and Dynamics: http://www.cotorelay.com/Contact_Resistance___Dynamics.pdf Magnetic Interaction: http://www.cotorelay.com/Magnetic_Interaction.pdf -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.3.0/290 - Release Date: 3/23/06
RE: [AMRadio] Voltage regulator
One diode will do it if it's not very far from the relay coils. Diodes are cheap but you don't one on every single coil if they are all in parallel. The whole purpose of the diode is to protect whatever is driving the coil from the back-emf pulse. In the case of a solid state device that back-emf can kill it instantly. A small 5VDC coil can generate a LOT of voltage when it's field collapses. As as the Amphenol relays go If they are DC coils they should have the reverse diode on them for good measure. Of course if they are AC coils (Some are) then you definitely should NOT use a diode. 73, Mark W1EOF -Original Message- From: Barrie Smith [mailto:[EMAIL PROTECTED] Sent: Sunday, March 19, 2006 4:20 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Voltage regulator Another couple of questions relative to relays this time. Some of my antenna relays have protective diodes and some don't. If a power supply were to be used only for switching relays, could the protective diode be placed at the output of the power supply, rather than at the relay? Also, looking at a couple of Amphenol coax relays I have here, there is not only a protective diode, but a (very) small disc ceramic capacitor across the coil. Further protection? 73, Barrie, W7ALW __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.5/284 - Release Date: 3/17/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.5/284 - Release Date: 3/17/06
RE: [AMRadio] Rubber Feet
The only caveat I've heard abotu McMasterCarr is that you must be VERY specific that you want everything shipped in one package. One guy I know had a tiny order come in three shipments over a period of two weeks. The shipping cost exceeded the parts cost. 73, Mark W1EOF -Original Message- From: John Lawson [mailto:[EMAIL PROTECTED] Sent: Sunday, March 19, 2006 6:25 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Rubber Feet On Sun, 19 Mar 2006, Darrell, WA5VGO wrote: What company has a good selection of rubber feet with screw mounting? All of the usual suppliers seem to have a very limited selection of mostly tiny self adhesive ones. Try McMaster-Carr - www.mcmaster.com - page 3527 recessed bumpers probably what you are looking for, plus Macmaster Carr's web interface is the finest, most comprehensive, easy to use site that I have ever found yet, and I buy stuff from the web all day. Once you've registered a credit card you can have items sent to you in the time in takes to find it and press the 'order' button. And they'll happily send you one 1/4-20 3/4 bolt, or a warehouse full of shelving - an ounce of glue, or railroad tank cars of cleaner - all with the same efficiency. Okay - McMaster-Carr commercial over now... Cheers John KB6SCO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.5/284 - Release Date: 3/17/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.5/284 - Release Date: 3/17/06
RE: [AMRadio] Class AB and B audio XFMRS
Good points about the complex relationship of the components making up a transformer. I especially liked the reminder about the bia used on recording heads... I had completely forgot about that. 73, Mark W1EOF BTW audio analog tape recorders minimized this problem with the head by using a high frequency bias, say 22 kcs, to keep the flux constantly changing and allowing good LF response while making the recording. The HF signal is filtered out on playback either by the playback head or immediately before the first preamp. Larry W3LW Some folks on here surely can amplify this and correct my fuzzy memory if needed. The problem is the energy transfer medium - THE IRON. At 01:02 PM 3/13/2006, John E. Coleman (ARS WA5BXO) wrote: Perhaps I should clarify one point that we may all be forgetting here. A XFMR will only transfer energy during the movement of the magnetic field (EXPANDING OR CONTRATING). If the magnetic field becomes stationary then no energy will be transferred to the secondary regardless of the amount of iron. But if the magnetic movement is fast enough then transfer efficiency can be high. As the frequency is lowered the magnetic movement is slowed down then the efficiency drops off. I'm not sure if this is the proper term mathematically but it is as if the coefficiency of coupling is not as good when the frequency becomes too low. I hope I'm not boring folks with this and some may say I am making a mountain of a mole hill. I just find it fascinating. I guess it is just my type of thing. John, WA5BXO Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John E. Coleman (ARS WA5BXO) Sent: Monday, March 13, 2006 11:36 AM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Class AB and B audio XFMRS The Band pass and energy Xfer of a transformer with no load is one thing but it all changes depending on the load and the DC involved. In class A balanced PP circuits the XFMR will still saturate at some frequency and load even if it is perfect balance on the PP circuit. XFMR saturation distortion in class A single ended service has a trapezoidal shape if the quiescent current is too high but in PP class A the shape is weird because the XFMR remains balance as for as DC is concerned but yet the XFMR will not produce the sign wave on the output if the frequency is too low. It resembles cross over distortion even though there is no cross over in class A push-pull. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.2.1/279 - Release Date: 3/10/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.2.1/279 - Release Date: 3/10/06
RE: [AMRadio] 51J3 or 75A3?
I've never been able to keep the Hammarlund line sorted out in my mind. What distinguishes the 160??? 73, Mark W1EOF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Sunday, March 05, 2006 1:12 PM To: amradio@mailman.qth.net Cc: amradio@mailman.qth.net Subject: Re: [AMRadio] 51J3 or 75A3? Great Thread! Under the category of, For what it's worth, I grew up using a 75A4 and about 20 years ago had my own 75A3. I will admit to being mesmerized by the Collins mystique and indeed they are outstanding receivers. Recently, I went out to re-obtain a 75A3 for my shack, along the way I came across a number of other receivers when all was said and done, I found the Hammarlund HQ-160 to be a far superior in an audio than the Collins Equipment. (as compared to the an unmodified Collins) This is not to say a Collins receiver doesn't have a future spot in my shack, however for the difference in price, I am very pleased with the HQ-160. I also picked up a HQ-170A, there is no comparison to the HQ-160 for audio quality, however it is very comparable to the Collins in Stability and dial accuracy. It's a Great Battle Mode receiver. Bottom line, for $100 less than what I was going to pay for a 75A3 that needed repair, I bought 2 outstanding and in there own way comparable receivers. Best Regards, Steve W1TAV __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/06
RE: [AMRadio] 51J3 or 75A3?
A friend of mine has an HRO-SR. It has mechanical not crystal filters. He also has a bunch of Collins receivers including an 75A1, 75A2, 75A3, 75A4, 51J4, along with several R-390s and an SP-600. One night we were messing around and listening to some guys on 160M AM with the various receivers. When he switched to the HRO it was... weird, almost ghostly. Honest we were not smoking anything but those guys coming through that National speaker and filling the shack sounded like signals from the past. REALLY long-delayed-echoes. I'm no audiophool but the sound was DISTINCTLY better and had another dimension to it. Ever since that night I moved the HRO-SR way up on my Want one before I die list. I remember him saying that any Collins receiver with crystal filtering really distorted the audio in a noticable way. YMMV. 73, Mark W1EOF -Original Message- From: Theo Bellamy [mailto:[EMAIL PROTECTED] Sent: Saturday, March 04, 2006 3:05 PM To: Discussion of AM Radio Subject: [AMRadio] 51J3 or 75A3? I am shopping for a receiver to use on AM. I think I want either a 75A3 or a 51J3. Which one is best for AM use as far as making pleasing sounds come out of the speaker? I used to have a 51J4 and a 75A4, and they worked fine (especially the 'J4), but I have heard that the 'J3 may have the best sounding audio section for AM. True? Thanks, Theo K4MO __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date: 3/2/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.1/273 - Release Date: 3/2/06
RE: [AMRadio] Re: AM Transmitter Advice??
Hey Bob - I really enjoyed reading the article about your 6AX5 transmitter in this months Collector. Very cool stuff and what I like most about it is you did for pure enjoyment. Kudos. 73, Mark W1EOF -Original Message- From: Bob Deuel [mailto:[EMAIL PROTECTED] Sent: Thursday, February 16, 2006 7:05 PM To: 'Discussion of AM Radio' Subject: [AMRadio] Re: AM Transmitter Advice?? Hello Larry and all: Larry's tongue in cheek comment employing 866's as a linear amplifier tube prompted me to contribute the following: Certain full-wave rectifiers can be configured to amplify or oscillate. I have built audio, Hartley and Simpson oscillators using only 6AX5GT's full-wave rectifiers as the sole active device. These were displayed at 2004 Mid-Atlantic Antique Radio Club Meet and actually won a Blue Ribbon. Late last year I built an AM transmitter consisting of a Hartley oscillator modulated by an AM modulator using only 6AX5GT full-wave rectifier tubes as the active devices. No solid-state magic, just simple full-wave rectifiers. The basic concept is that of the Heintz and Kaufman gridless Gammatron circuits. The transmitter was set up for the broadcast band and works fine. It has been publicly demonstrated a couple times now and a write up including the circuit was published in the February, 2006 issue of the Tube Collector magazine which is the bi-monthly magazine published by the Tube Collectors Association, Inc. It is fun to make full-wave rectifiers do more than just rectify. Bob, K2GLO -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of ne1s Sent: Thursday, February 16, 2006 10:36 AM To: Discussion of AM Radio Subject: [AMRadio] Re: AM Transmitter Advice?? Donald Chester writes: Assuming one is going to build a linear, and so putting aside other issues such as linear vs plate modulation, why do you think it makes a difference what tube is used? Are you referring to running a linear at greater than legal limit?. Well, go ahead and try building a legal limit linear that runs a pair of 807's in the final. Yeah, or a pair of 866As Sorry (the devil made me do it). 73, -Larry/NE1S __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.10/262 - Release Date: 2/16/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.10/262 - Release Date: 2/16/06
RE: [AMRadio] REPLY TO addresses
Brian - Outlook doesn't control who you reply to. There is a button for Reply and a button for Reply All just like all the other popular email programs. The problem is in the default setting for a particular email list. Usually you have a choice which way a reply goes. The problem is that no matter which way it's setup it is wrong for some percentage of the list members. Some people compensate by always clicking ReplyAll which hits both the individual and the list. This is handy for when you intentionally desire to reply immediately and separately to the individual AND want to share the response with the other list members (like this email). That's the only case one should use ReplyAll. It's just something that you need to get used to. No software can reolve all the decisions, and as you imply nor should they. 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Saturday, February 11, 2006 3:24 PM To: Discussion of AM Radio Subject: [AMRadio] REPLY TO addresses - WAS: restored Gonset G-76 Dan if you got a better e-mail program like PEGASUS (it's free!) you could SELECT the reply to go to whomever you wanted. The sender, the list, the CC: etc. - I would hate to go to Outlook or something that takes control of who you reply to! A lot of these lists force people to reply to the list AND to the sender so you end up getting 2 or 3 copies of the reply in some cases. The Glowbugs group is chronic about that! http://www.pmail.com/ Worth having. I have used it for years. Has some great mail filtering and folder features that lets you really organize multiple subscribed lists/groups extremely well. YMMV - 73 de AF4K, Bry On 8 Feb 2006 at 12:49, Dan wright wrote: WELL HELL! It was NOT my intention to send this to the list. I apologize both to Craig and to the list. However I am not pissed or anything about the rig. There are several very good reasons it may have worked when he checked it, and now it doesn't. I kinda wish this list had a reply to that went to the sender and not the list. This ain't the first time I have been burned. It's my fault, I need to check the address fields more carefully.so once again I apologize!! Dan -- WAØJRD .. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 2/10/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 2/10/06
RE: [AMRadio] REPLY TO addresses - WAS: restored Gonset G-76
Hey Dan - The people that make the free FireFox browser (now 15% of the market and climbing!) also have an email client, a calender/scheduler, and an HTML editor as separate programs. They are all very high quality and 100%. 73, Mark W1EOF -Original Message- From: Dan wright [mailto:[EMAIL PROTECTED] Sent: Saturday, February 11, 2006 4:11 PM To: [EMAIL PROTECTED]; Discussion of AM Radio Subject: Re: [AMRadio] REPLY TO addresses - WAS: restored Gonset G-76 Dan if you got a better e-mail program like PEGASUS (it's free!) you could SELECT the reply to go to whomever you wanted. Hey Bry!! Thanks for the nice note(8- I use Eudora.used it for years and yearsand if I take the time to LOOK at what I'm doin' grin, I can also select who the recipient is. ALTHOUGH I need to check out PEGASUS Right now I am struggling with dialup and the phone lines are having problems and are getting slower and slower. In a week or so I have an appointment to get RoadRunner installed and after that, I'll be downloading stuff!!! thanks again!! 73 de Dan -- WAØJRD .. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 2/10/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 2/10/06
[AMRadio] RE: Grandpa's Radio
And we should totally ostracize anyone within our group who supports the League, as the clique in Newington certainly does not have OUR best interests in mind. Nice! Hey that's what ham radio is all about: Making yourself feel better by putting down those that don't agree with you... no better yet GET RID of them! Lets just have a little club where all people will think like you! They will make you king! And you can all get together and laugh at those little people who are not in your club. Real nice OM. You, and people who think like you, are at the core of what is wrong with amatuer radio. Hope you're happy in your imaginary little club. 73 omitted Mark W1EOF -Original Message- From: Phil Galasso [mailto:[EMAIL PROTECTED] Sent: Tuesday, February 07, 2006 8:14 AM To: AM Reflector Subject: [AMRadio] RE: Grandpa's Radio - Original Message - Trying to kill a proposal because you believe it's out to screw you is just plain fantasy. The proposal is a future based plan for our Service. And if you believe that, I have this lovely bridge in New York City that I would like to sell you. Hell, I could even throw in the Pierce Street and Market Street bridges in downtown Wilkes-Barre for just $11,306 extra! (The mayflies are available for a slight extra charge.) The League and its supporters, in clamoring for even more regulation of an already grossly overregulated radio service, remind me of the nerdy little kid who would always ask the teacher to assign more homework to the class. Like that kid, the League people deserve to have the living s--t beaten out of them! Rather than doing that, we should simply refuse to buy their publications and refuse to take out membership in that pernicious organization. And we should totally ostracize anyone within our group who supports the League, as the clique in Newington certainly does not have OUR best interests in mind. Of course, we will hear that old chestnut about members being able to influence the League. If you believe that, I'm sure you also have faith in Santa Claus, the Easter Bunny, and the Tooth Fairy. There is something seriously wrong with amateur radio regulation in this country when even Castro's Cuba has more lenient regulations than we do. For the Cubans don't have to put up with any of that subband nonsense. They have three classes of operator license, with CL stations being restricted to two or three bands, CM stations having most privileges, but with reduced power, and CO stations having full privileges, with no emission or bandwidth subbands to worry about. But the Uncle Toms of our hobby/service will always insist that we Americans should always have to ride in the back of the spectrum bus... Phil Galasso K2PG __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/251 - Release Date: 2/4/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.2/252 - Release Date: 2/6/06
RE: [AMRadio] 813 question
I asked on the Tube Collector Assc list and got this response from Lane Upton, who is a retired engineer from Eimac and one of the knowledgeable people around regarding the manufacturing of transmitting tubes: The leakage/breakage of metal to glass seals is primarily due to thermal or mechanical stress. There should be no reason for tubes just lying around to have any seal problems. Lane Upton 73, Mark W1EOF -Original Message- From: charles free [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 31, 2006 10:13 AM To: amradio@mailman.qth.net Subject: [AMRadio] 813 question Hello all, I have a buddy who insists that if I don't get my old 813's out of the future project box and fire the filaments up on them now and then, the base seals will eventually deteriorate. I guess he is talking about the adhesive that secures the base to the bulb. I don't see how the glass envelope where the leads pass through the glass could be affected by lack of use, but maybe one of you folks has experience with this. Anybody heard of this one before? W4MEC, Charlie in NC SNIP -- Internal Virus Database is out-of-date. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
RE: [AMRadio] AM Transmitter Advice??
I agree with Larry. I've been collecting the pieces for a 813x2 desktop amp for awhile now. I'm almost ready to begin. I have heard from many AM ops that with the correct setup, a linear amp works great. As for the operation of 813s on 10M, Ronnie is correct that some people have had trouble there. I have some information from a ham who built an amp that runs from 160 - 10M. All it took was specific consideration of the interelectrode capacitance on 10M. If you are really interested I could email you the scans he sent me (once I get an OK from him). Best of luck on it and please keep us all informed as to your progress! 73, Mark W1EOF -Original Message- From: ronnie.hull [mailto:[EMAIL PROTECTED] Sent: Monday, January 30, 2006 3:11 PM To: Discussion of AM Radio Subject: Re: [AMRadio] AM Transmitter Advice?? Larry for years I used a pair of 813's in grounded grid and drove them with a ranger. It produced great sounding audio. I still have that as my backup to my globe king. 813's are great tubes. The only drawback for me is I like to operate on ten meters and 813's are shakey at best, up there. good luck on your project, Iknow you will enjoy it. ronnie - W5SUM -- Original Message --- From: Larry Keith [EMAIL PROTECTED] To: Discussion of AM Radio amradio@mailman.qth.net Sent: Mon, 30 Jan 2006 12:06:43 -0800 (PST) Subject: [AMRadio] AM Transmitter Advice?? Well, Let's see if we can change the subject.. 8-) I am gathering ideas for a homebrew AM transmitter.. My friend, KR1S (Jim Kearman) is designing an AM transceiver, for me. We plan for this to be a solid-state unit that will deliver about 100 watts out. It will be single band (75 meters) and I have been considering using that to feed a homebrew linear. I have the makings of a 2 x 813 amp thanks to my and Jim's hamfesting efforts. So far, we have been reading and kicking around ideas. It seems that with the derating of the amp to handle the continuous carrier, etc.. may be more trouble than it is worth. So, I would be interested in opinions as to the relative merits of using a linear vs high-level modulation. And, pointers to existing circuits would be helpful.. Any ideas? 73, Larry KQBY Larry Keith 231 Shenandoah Trail Warner Robins, GA 31088-6289 [EMAIL PROTECTED] 478-329-0030 (home) __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb --- End of Original Message --- __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
RE: [AMRadio] AM Transmitter Advice??
No problem with them mounted horizontally if in the correct plane. Example: For years in the ARRL handbook 1960s there was an article that described separate 813x2 amp for each band, all rack mounted. As a young ham in the early 70s I would looke that and drool. The 813 is a great tube, certainly very high on the watt-per-dollar chart. It's always been one of my favorites along with the 810, 4-400, and the 4-125. I always thought the 4-125 would be great as a final for a say... 350W CW transmitter. Like the T-9er, but with more power out. Anyone needing projects, or potential projects email me off-list. No charge, I will give them away to a good home. 73, Mark W1EOF -Original Message- From: Todd, KA1KAQ [mailto:[EMAIL PROTECTED] Sent: Monday, January 30, 2006 3:46 PM To: [EMAIL PROTECTED]; Discussion of AM Radio Subject: Re: [AMRadio] AM Transmitter Advice?? On 1/30/06, W1EOF [EMAIL PROTECTED] wrote: I agree with Larry. I've been collecting the pieces for a 813x2 desktop amp for awhile now. I'm almost ready to begin. Hmmm... interesting. I actually have a nice horizontally-mounted CW 813 transmitter sitting up over the garage. I wonder what it would take to add a modulator? I chuffed it into a Globe King cabinet because I wanted to use the rack for something else, and there it sits. Yesterday while I was playing around at building a homebrew (ala Don Chester) 40 meter dipole, I was listening on 40 to a few guys discussing the venerable 813. One of them was Tom M...Marcellano? W3BYM (I think). He's written a fair number of articles for ER as I recall, probably a few about 813 rigs. I think he said it was his favorite tube and had nothing but praise for it. At least one of the other guys either had or was running a 813 rig also. Wish now that I'd paid more attention, but it might've resulted in soldering my finger instead of the antenna. Has anyone ever mounted them horizontally to save space? I can't remember if it's a single tube or a pair. Sure is compact. Power supply is in the garage because it was too heavy to haul upstairs. Looks like a Beastly 610 transformer on the chassis. As an aside, I think K1JJ Tom is still building a rig with a pair of 813s blown through Dietz lantern globes as chimneys. There were pictures of it on amfone not long ago. de Todd/'Boomer' KA1KAQ -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
RE: [AMRadio] Why the League Petition would be BAD for AM
-Original Message- From: VJB [mailto:[EMAIL PROTECTED] Sent: Thursday, January 26, 2006 4:28 AM To: amradio@mailman.qth.net Subject: [AMRadio] Why the League Petition would be BAD for AM SNIP I've already had one heckler, N2NGY, breaking into a QSO on 75m and telling us that your Petition will finally do us in. SNIP Paul I'm not diagreeing with you but consider the source Paul (See below, from the ARRL website) - 73, Mark W1EOF BERKELEY HEIGHTS, NJ: The FCC sent a Warning Notice March 14, 2000, to Advanced licensee Ronald Marshott, N2NGY, to advise him that information before the Commission indicates the licensee has been deliberately interfering with the radio operations of other licensed amateurs on the 75-meter band. The FCC also said it has information that the licensee failed to identify, identified by call signs not your own, and have made threats to other licensees. FCC Special Counsel for Amateur Radio Enforcement Riley Hollingsworth warned Marshott that operation of the type described will not be tolerated and could result in a fine and revocation proceedings. Hollingsworth requested the licensee contact him to discuss the matter. January 15, 2002 Mr. Ronald Marshott 56 Briarwood Drive West Berkely Heights, NJ 07922 RE: Warning Notice: Amateur Radio license N2NGY Dear Mr. Marshott: Monitoring information before the Commission indicates that you were transmitting music during transmission on 3.832 MHz on the evening of November 27, 2001. Please be advised that such transmissions are contrary to the Commission's rules regarding the Amateur Radio Service, and degrade the Service for legitimate users. You are requested to review the Commission's rules for the Amateur Service, particularly Section 97.113(a)(4). You may call me at 717-338-2502 if you have any questions about this matter. -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.22/239 - Release Date: 1/24/06
[AMRadio] Music from the 40s
Todd - I know it doesn't sound the same as those 6V6's pushing your speaker, but there are streaming alternatives on the internet. Somebody said that WABC streams although I have not checked out their website. There are also quite a few on live365.com. My favorite though is WMKV in Ohio. Pretty much 24/7 40s style music. Lastly there is XM radio which has a channel devoted to 40s music. I don't have a good AM broadcast receiver setup in the office at the moment but I will soon. I should be able to get WABC here in RI most nights. 73, Mark W1EOF -Original Message- From: Todd, KA1KAQ [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 24, 2006 9:37 AM To: Discussion of AM Radio Subject: Re: [AMRadio] (no subject) On 1/23/06, ne1s [EMAIL PROTECTED] wrote: It was like being caught in a time warp. Some of my fondest childhood memories are of hanging out in my grandfather's cellar in Chatham, NJ building, fixing or otherwise diddling with some radio with WABC cranking the tunes. I used to enjoy listening to big band music on 830 WCRN out of Worcester/Framingham area but they went to an oldies format sometime last year. I like oldies too, but it's hard to find 40s type music on AM these days so I miss WCRN in that sense. At 50kw, they have a potent signal up this way. You might give them a try too. There was also a station over in NY that played big band music a few years ago, but they got bought up by Disney and ended up playing children's music and soundtracks from Disney movies. Think it was WQEW? Up near the top of the dial. It's always more enjoyable to hear some old music on AM broadcast rather than more talk radio, but to me at least, there's nothing like hearing some Glenn Miller or Tommy Dorsey tunes rumbling out of a big old speaker with the receiver dials and tubes glowing away. Thanks for passing this on, Larry - I'll have to fire up that SX-28A in the front foyer that you were tuning around with in December - bet it'll sound great, WABC always comes in here well. (o: de Todd/'Boomer' KA1KAQ -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.21/236 - Release Date: 1/20/06
RE: [AMRadio] OT but ya never know
John - I have passed this along on the Tube Collectors Association list. There are several members who collect this kind of stuff in addition to vacuum tubes. 73, Mark W1EOF -Original Message- From: John Lawson [mailto:[EMAIL PROTECTED] Sent: Friday, January 20, 2006 9:19 PM To: amradio@mailman.qth.net Subject: [AMRadio] OT but ya never know I would like to find someone who has one of the old Technicolor CVC video machines or cameras that still is working in playback mode. If you have such a beast languishing deep in a closet or up on a high shelf - please contact me privately off-list. Will buy or borrow - pay all shipping, etc. Thanks! Cheers John KB6SCO -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.21/235 - Release Date: 1/19/06
RE: [AMRadio] Why I have not been on the radio the last few days
My thoughts and prayers for your daughter and your entire family for a speedy and full receovery OM. 73, Mark W1EOF -Original Message- From: Donald Chester [mailto:[EMAIL PROTECTED] Sent: Friday, January 20, 2006 5:19 PM To: amradio@mailman.qth.net Subject: [AMRadio] Why I have not been on the radio the last few days http://www.theleafchronicle.com/apps/pbcs.dll/article?AID=/2006011 9/NEWS01/601190314/1002/NEWS17 http://www.dnj.com/apps/pbcs.dll/article?AID=/20060118/NEWS01/6011 80335/1002 __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.21/235 - Release Date: 1/19/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.14.21/235 - Release Date: 1/19/06
RE: [AMRadio] Re: Your comments about AM
EXACTLY Brian. Just as it's always been. And many of the creative employees in private industry are hams. 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Monday, January 16, 2006 2:10 PM To: Clay Curtiss W7CE; Discussion of AM Radio Subject: Re: [AMRadio] Re: Your comments about AM Whatever. I think we're splitting hairs now. The fact is that hams are not in the forefront now, but private industry is, and has been for decades. SNIP -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.18/230 - Release Date: 1/14/06
RE: [AMRadio] Web page appears in opposition to RM-11306
I agree Brian! I've heard encroachment by SSB stations before, but never down as far as that last contest. Some people I wrote to said I had to be making it up, that they stopped at 7025 or 7030. But like you, I copied a SSB station calling CW Contest on 7002. Disgraceful. I try to not get an attitude toward contesters. It's never been my thing but I understand that there are plenty of areas in ham radio that don't interest me but do others. Maybe it's the excitement of the chase, but it seems like contesters take the cake on rudeness and inconsideration when they get into the thick of it. Let me also say that I'm sure 90% of contesters don't behave like this. But as we all know it only takes one or two idiots to make any group look bad. This is why some hams have problems with AM'ers. All it takes is one splatter-happy clod, one idiot playing music, etc to make up the minds of many that ALL AM'ers are idiots. Most of us are not like that but we get painted with the same brush. Good thing to keep in mind when you're thinking badly about some other group. :-) 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Monday, January 16, 2006 6:15 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Web page appears in opposition to RM-11306 On 16 Jan 2006 at 22:53, Donald Chester wrote: The IARU band plan say no phone below 7050. Obviously the Canadian and Mexican hams, plus who knows what other countries south of the border, are not following the plan. The IARU does not have any enforcement power. The band plan is merely a suggestion, not a legal restriction. Canada and (I assume) Mexico have no emission subband limitations; they can legally transmit phone all the way down to 7000. The US is the only country in the region (and is suspect the world) that PROHIBITS phone below 7150. Another aspect of the problem is the US licence class subband structure. 7000-7025 is limited to extra class only, so non-extra US hams can work cw only from 7025 up, and the cw activity rarely goes above 7040 or 7050, so for all practical purposes US Advanced and General class ops are limited to a very narrow segment just above 7025 for cw operation. Since the US Extra class cw requirement has been reduced to the 5 wpm Novice level, and there is no longer any distinction in the code requirement for Extra, Advanced, General or Novice, what is the point of continuing to set aside an exclusive 25 kc/s segment for Extra class cw? In Region 1 (Europe) the entire 40m band is only 7000-7100, except for some recently opened limited use of 7100-7200. Hopefully the broacast issue we be resolved and 7100-7200 will eventually become exclusive amateur worldwide. Don is quite right. The whole thing has fallen like a deck of cards. The U.S regulations are more out of step (and out of compatibility) than ever before, particularly on 40m. In the last contest I listened to, there were non-U.S. stations running SSB pile ups all the way down to 7002 KHz. Yes boys, 7002! SO much for foretelling how the gentlemen's agreements are going to work on all of the bands when the ARRL gets their absurd bandwidth scheme in place! Gentlemen's agreements only work among gentlemen. __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.18/230 - Release Date: 1/14/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.18/230 - Release Date: 1/14/06
RE: [AMRadio] Web page appears in opposition to RM-11306
Jim - I am a CW op about 99% of the time. Yet I have to be honest and say I agree with you on 80M. Other than during a contest, we can give up some space to phone operation. I'd say to be fair a starting point would be 3700. Maybe 3650. However I disagree on 40M and 20M, especially 40M. Almost every night that little sliver of usable band is filled with CW signals. If you are not an Extra, as a CW op your version of 40M is 7026 - 7046 most night. 20kc. Not a heck of lot of room ro stretch out at all. I'd love to be able to get that @*[EMAIL PROTECTED] broadcast out of 40M. Holy moly if we had that whole band unmolested it would be a GREAT place to play. Just my feelings as a CW op. 73, Mark W1EOF -Original Message- From: Jim Wilhite [mailto:[EMAIL PROTECTED] Sent: Monday, January 16, 2006 10:21 PM To: Discussion of AM Radio Subject: Re: [AMRadio] Web page appears in opposition to RM-11306 SNIP hope, but the fact remains, more space is needed for phone operation and the lower half of 80, 40,and 20 are under utilized. 73 Jim W5JO SNIP -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.18/230 - Release Date: 1/14/06
RE: [AMRadio] recent comments on AM
Hi Brian - I don't understand how this is even a point of contention. There are many different points available for contention or discussion in this matter such as what they did after they got the results of the poll, etc. FACT: The ARRL polled their members. I am a member. I got polled. I gave my opinion. All the other ARRL members I know were also polled too. I don't think it adds anything meaningful to the discussion when we get arguing about things which are indisputable facts. To deny the fact that they asked for, and got their members opinions is just silly isn't it? 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Friday, January 13, 2006 5:35 PM To: Discussion of AM Radio Subject: Re: [AMRadio] recent comments on AM No, you let us know how they did such a great job of polling radio amateurs instead of side stepping and claiming that they did... Where's the beef? On 13 Jan 2006 at 15:15, peter markavage wrote: Thanks for the English lesson. Let me know when you have more to contribute to my grammar. Pete, wa2cwa On Fri, 13 Jan 2006 15:05:13 -0500 Brian Carling [EMAIL PROTECTED] writes: On 13 Jan 2006 at 14:46, peter markavage wrote: ARRL request for comments to the draft proposal is fully documented. Fully? As compared to what? Half-documented? How do you partially document something? __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06
RE: [AMRadio] recent comments on AM
Oh yeah... you are probably on that special list where they make sure you don't receive your QST or ARRL emails. That explains it then. You're a hoot Brian! This stuff is so silly... I'm taking my foil hat off now and going back to thinking about radio. 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Friday, January 13, 2006 6:56 PM To: W1EOF Subject: RE: [AMRadio] recent comments on AM They never asked me for my opinion. I was a member at the time. On 13 Jan 2006 at 18:30, W1EOF wrote: Hi Brian - I don't understand how this is even a point of contention. There are many different points available for contention or discussion in this matter such as what they did after they got the results of the poll, etc. FACT: The ARRL polled their members. I am a member. I got polled. I gave my opinion. All the other ARRL members I know were also polled too. I don't think it adds anything meaningful to the discussion when we get arguing about things which are indisputable facts. To deny the fact that they asked for, and got their members opinions is just silly isn't it? 73, Mark W1EOF -Original Message- From: Brian Carling [mailto:[EMAIL PROTECTED] Sent: Friday, January 13, 2006 5:35 PM To: Discussion of AM Radio Subject: Re: [AMRadio] recent comments on AM No, you let us know how they did such a great job of polling radio amateurs instead of side stepping and claiming that they did... Where's the beef? On 13 Jan 2006 at 15:15, peter markavage wrote: Thanks for the English lesson. Let me know when you have more to contribute to my grammar. Pete, wa2cwa On Fri, 13 Jan 2006 15:05:13 -0500 Brian Carling [EMAIL PROTECTED] writes: On 13 Jan 2006 at 14:46, peter markavage wrote: ARRL request for comments to the draft proposal is fully documented. Fully? As compared to what? Half-documented? How do you partially document something? __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.17/228 - Release Date: 1/12/06
RE: [AMRadio] Millen High Voltage Connectors
They are fine when the connection is inside an interlock protected cabinet. Not very conveinent for troubleshoting or working on the equipment, but they work fine. If the connector is outside the cabinet then naturally it must not have an exposed terminal. I also agree on the RF connectors for high voltage. Even if it's marked it is too easy for you, or someone else to make a fatal mistake. This is made worse by using coax (a common RF cable). That's just bad design. Spend a few extra bucks and get the proper connector, one that's safe. Life is too short to mess around. 73, Mark W1EOF -Original Message- From: Brett gazdzinski [mailto:[EMAIL PROTECTED] Sent: Monday, January 09, 2006 6:56 PM To: 'Discussion of AM Radio' Subject: RE: [AMRadio] Millen High Voltage Connectors What is wrong with ceramic feedthroughs? I don't think I like the idea of using RF connectors for high voltage, what happens if you or someone else mix it up with RF antenna or output stuff? Brett N2DTS -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ed Swynar Sent: Monday, January 09, 2006 4:01 PM To: Discussion of AM Radio; [EMAIL PROTECTED] Subject: Re: [AMRadio] Millen High Voltage Connectors Hi Dave, I solved the problem of HV B+ arc-overs here by exclusively using NOTHING but good-quality SO-239 coax receptacles, RG-8 coax lines for the B+ leads, terminated in good-quality PL-259's... Works like the proverbial charm --- have yet to encounter ANY arc-over failures since adopting this approach universally at my station in the late 70's... ~73~ Eddy VE3CUI - VE3XZ PS: Emphasis on the words ...good-quality --- NONE OF THAT CHINESE JUNK here!!! - Original Message - From: david knepper [EMAIL PROTECTED] To: amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Monday, January 09, 2006 3:50 PM Subject: [AMRadio] Millen High Voltage Connectors My homebrew transmitter, designed by Stan, W3TGR now a silent key, is going through exhaustive and often frustrating testing. Stan used lots of shielded wire - you know the Belden stuff that is deteriorating over time with brittle insulation on the wire. I had to replace several leads because the center conductor was shorting to ground when the insulation became brittle. So it goes ... Today, I thought that I had finally debugged the unit - pair of 813's modulated by 805's - but I heard the troubling sound of high voltage to ground. Measuring the Millen connectors to ground revealed a short. Here the Millen connectors on the modulator were arcing to ground on the secondary side of the modulation transformer running from the high voltage through the secondary winding to the PA amplifier. I am using those light tan units that are supposed to be better than the red connectors. Stan used these connectors on the PA amplifier, the modulator deck, and the high voltage power supply. I suppose that under modulation that the peaks exceeded the voltage rating of the Millen connectors. Once before many years ago, I had the same problem. However, these connectors are often used in homebrew construction projects as described in the ARRL handbook. Any ideas out there other than to go with ceramic feedthrough insulators. Perhaps, it is because of their age and the insulation is breaking down. Who knows! Thanks Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb __ AMRadio mailing list Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net AMfone Website: http://www.amfone.net AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.15/223 - Release Date: 1/6/06 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.371 / Virus Database: 267.14.15/223 - Release Date: 1/6/06
